Bus Advertising

In addition to public transport buses, all-over advert buses are often privately hired specifically for a special promotional use, such as a political campaign or specific product promotions. These will often make use of open top buses to allow the interaction of the campaigners/promoters with the public.
Legal issues
In Norway, the use of wrap advertising on buses was prohibited by the road authorities. The reason behind the ban was that in an emergency the windows might need to serve as an emergency exit, and that the advertising would make the window harder to break with the emergency hammer. Gaia Trafikk argued against the ban, pointing out that their tests showed that the thin wrap had no impact on the breakability of the window, but did remove the advertising which covered the windows.